Prospect of the Utilization of Low Concentration Coal Mine ...
Transcript of Prospect of the Utilization of Low Concentration Coal Mine ...
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Prospect of the Utilization of Low Concentration
Coal Mine Methane in China
Liu Wenge, Han Jiaye, Sang Fengyun
China Coal Information Institute
Tel:+86-10-84657838
Email:[email protected]
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1.Current situation and issues of CMM utilization in China
2. Safety transportation technologies of low-concentration CMM
3. Major low-concentration CMM utilization technologies
4. Policies and standards related to CMM utilization in China
Outlines
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2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2015
Utiliz
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CM
M V
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me/1
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Recovery Volume Utilizaiton Volume Utilization Rate
Recovery Volume, Utilization Volume and Utilization Rate of CMM
from 2000 to 2011 and 12th Five-Year Plan in China
1. Current situation and issues of CMM utilization in China
CMM Drainage: 11.4 billion m³ in 2012
CMM Utilization: 3.5 billion m³ in 2012
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One of the major reasons of such situation is that the coal seam
occurrence conditions in China are relative complicated and the
permeability of coal seams is low which is about 0.002-16.17
millidarcy. Given the occurrence conditions and the limitations
in terms of drainage technologies, the issues such as drainage
difficulties and low concentration of the CMM (<30%) are
common in the major mining areas in China.
Because the utilization methods of the low concentration CMM
are mostly in the industrial demonstration stage, and have not
been widely promoted, a huge amount of low concentration
CMM would be directly emitted into the air every year.
1. Current situation and issues of CMM utilization in China
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The safety transportation technology is a key process link in
processing and utilizing low concentration CMM. The
reasonable configuration and safe and reliable operation of the
technology are directly related to the normal operation of the
power generation units and would influence the safety of the
CMM drainage system, which is playing a key role in the
comprehensive utilization of CMM.
1. Current situation and issues of CMM utilization in China
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2. Safety transportation technologies of low-concentration CMM
At present, there are two mature low-concentration CMM
transportation technologies which are using water as the safety
medium:
The Fine Water Mist Safety Transportation Technology for
Low-Concentration CMM developed by Shengli Oil Field
Shengli Power Machinery Group, China; and
The Gas-Water Two-Phase Safety Transportation
Technology for Low-Concentration CMM developed by
National Engineering Research Center for Coal Gas
Control, China.
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Fine Water Mist Safety Transportation Technology for Low-
Concentration CMM
The Fine Water Mist Safety Transportation Technology for
Low-Concentration CMM was authenticated by the
academician team organized by the State Administration of
Work Safety (SAWS) in December 2005, and was defined
as the industry standard by SAWS in 2009. At present,
more than 1000 systems using this technology have been
installed throughout China.
2. Safety transportation technologies of low-concentration CMM
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2. Safety transportation technologies of low-concentration CMM
Process of Water Mist Low Quality CMM Transmission System
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The Gas-Water Two-Phase Safety Transportation Technology for
Low-Concentration CMM
The industrial operation test for this technology was
conducted in the Xieqiao Coal Mine of Huainan Mining
Industry Group in April, 2008. At present, seven sets of test
and experiment facilities have been established. The
application for the national industrial standard and the
national standard based on this technology is undergoing.
2. Safety transportation technologies of low-concentration CMM
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2. Safety transportation technologies of low-concentration CMM
供水管
水池备用水泵
主水泵 瓦斯
发电
机组
瓦斯
发电
机组
注水口
计量装置54
1排放管
回水管
排放管
1
432瓦斯输送管
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Process of Gas water Two-phase Transmission System
排放管 Discharge pipe; 回水管 Return pipe; 注水口 Filling pipe end;计量装置 Metering device;
主水泵 Main feedpump; 水池 Water tank; 备用水泵 Spare pumps; 瓦斯发电机组 Gas power
generation; 瓦斯输送管 Gas transmission pipeline; 供水管 Water supply pipe
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The utilization technologies of low-concentration CMM that are
mature or in the industrial demonstration stage at present
include:
Direct power generation technology with combustion engine;
Concentration and purification technology;
Catalytic oxidation gas turbine power generation technology;
2 Safety transportation technologies of low-concentration CMM
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3. Major low-concentration CMM utilization technologies
Direct power generation technology with combustion engine
The CMM will easily explode at the concentration of 5~16%.
The explosion will be most powerful when the concentration of
methane reaches about 9%. In such case, the explosion speed
may reach 2000~3000m/s, generating a substantial amount of
energy. The direct power generation technology with
combustion engine uses this principle to drive engine.
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Direct power generation technology with combustion engine
In terms of direct power generation technology with combustion
engine, China has made breakthrough first. Shengli Oil Field
Shengli Power Machinery Group is the first company that has
successfully developed the low-concentration CMM power
generation unit in the world, which could transfer the CMM with
a concentration of more than 6% into electricity.
By seeing the huge potential market of the low-concentration
CMM power generation in China during the 12th Five-Year Plan,
Caterpillar Inc. in USA has entered in the field of low-
concentration CMM power generation, and developed the
power generation units that can be used with the low-
concentration CMM with the concentration of more than 10%.
3. Major low-concentration CMM utilization technologies
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3. Major low-concentration CMM utilization technologies
胜动500kw低浓度瓦斯发电机组
Generator units using low quality CMM produced
by Shengdong Group
河柴1000Kw低浓度瓦斯发电机组
Generator unit using low quality CMM produced
by Henan Diesel Engine Industry Co., Ltd
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Concentration and purification technology
Vacuum Pressure Swing Adsorption (VPSA) is a relatively
mature technology that can be used to concentrate and
purify the low-concentration CMM.
The main technology principle of this technology is to
improve the purity of CMM by vacuuming after the low-
concentration CMM has been adsorbed under normal
pressure, or using vacuuming to reduce the partial pressure
of the absorbed component so as to desorb the absorbed
component (CH4) under negative pressure.
3. Major low-concentration CMM utilization technologies
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真空泵
吸附塔
尾气
细
水
雾
输
送
抽放低浓度瓦斯 储罐
燃气发电(1)
民用燃气(2)
Technological process diagram of concentration and purification
technology of Low Quality CMM
3. Major low-concentration CMM utilization technologies
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Concentration and purification technology
The industrial test run of VPSA has been conducted in
Huainan Mining Industry Group. The commissioning of the
project has been started in April, 2011. At present, the low-
concentration CMM with the methane concentration of 12%
could be purified to 30% for civil utilization. The capacity of
the project is 1800 Nm3/h.
3. Major low-concentration CMM utilization technologies
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3. Major low-concentration CMM utilization technologies
淮南矿业集团低浓度瓦斯提纯示范项目
Demonstration Project of Concentration and purification technology
in Huainan Mining Industry Group
示范项目工艺流程 Technological Process of Demonstration Project
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Concentration and purification technology
Sichuan Tianyi Science & Technology Co., Ltd. is working
with GE Company to develop the power generation
technology based on the VPSA of low-concentration CMM.
The Japanese Osaka Gas Joint-Stock Company and the
Liaoning Fuxin Mining Industry Group conducted the
pressure swing adsorption purification test for low-
concentration CMM in 2009, purifying the concentration of
the CMM from 20-30% to 45-55%.
3. Major low-concentration CMM utilization technologies
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3. Major low-concentration CMM utilization technologies
Demonstration Project that Japanese Osaka Gas Joint-Stock Company
Built in Liaoning Fuxin Mining Industry Group
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Catalytic oxidation gas turbine power generation technology
The catalytic oxidation gas turbine power generation
technology with low-concentration CMM (2%) is developed
by the Kawasaki Heavy Industries of Japan;
The major process flow is that the gas turbine automatically
absorb the CMM with the concentration of 2% (if the
concentration is higher than 2%, the equipment may mix
certain amount of air to dilute the CMM), and then the gas
turbine will generate power through catalytic combustion.
3. Major low-concentration CMM utilization technologies
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Technological Process Developed by Kawasaki Heavy Industries of Japan
3. Major low-concentration CMM utilization technologies
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4. Policies and standards related to CMM utilization in China
Utilization policies
On January 21, 2010, the State Administration of Work
Safety issued the No.29 order to cancel the limitations on
the utilization of gas concentration that are specified in the
Coal Mine Safety Procedures, providing the legal guarantee
for the utilization of low concentration CMM.
The original regulation: During the utilization of gas, the
concentration of the gas shall not be lower than 30%.
New regulation: If the concentration of the gas is lower that
30%, the gas shall not be directly used to burning. For
combustion engine power generation and other purposes, the
utilization and transmission of the gas shall be implemented
according to the related standards, and the safety technical
measures shall be made.
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Standards regarding to safe transmission
The State Administration of Work Safety issued ten safe
production standards including the General Technical
Conditions of AC Power Generation Units driven by Low
Concentration CMM Reciprocating Internal Combustion
Engine, and the Code of Designing of Safety Guarantee
System of Low Concentration CMM Pipeline Transmission
System, which have been implemented since July 1, 2010
The implementation of such standards has played an active
role in improving the utilization rate of low concentration
CMM.
4. Policies and standards related to CMM utilization in China
You are sincerely invited to attend:
2013 International Workshop on CBM/CMM in China
October, 2013, Beijing, China
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